NLM Gateway is a good tool for finding meeting abstracts for AIDS and other conferences. Abstracts from the 16th International Conference on AIDS (held in Toronto, Canada, in 2006) were recently added to the NLM Gateway Meeting Abstracts collection.
Other sources of AIDS meetings conferences include AEGIS (AIDS Education Global Information System). Abstracts for the International Conference on AIDS are also available on the International AIDS Society web site. Details on how to use these resources to find AIDS meetings abstracts are on the Public Health Library’s AIDS/HIV Resources web page.